CN111792673A - 一种新型六方结构BaMoO4及其制备方法 - Google Patents
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- 238000000034 method Methods 0.000 title claims description 10
- 229910002926 BaMoO4 Inorganic materials 0.000 claims abstract description 39
- 239000007787 solid Substances 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims abstract description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000005245 sintering Methods 0.000 claims description 8
- 229910052786 argon Inorganic materials 0.000 claims description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Inorganic materials O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Inorganic materials [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 239000010979 ruby Substances 0.000 claims description 3
- 229910001750 ruby Inorganic materials 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000004093 laser heating Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 2
- 238000011160 research Methods 0.000 abstract description 5
- 239000013078 crystal Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 3
- 239000000843 powder Substances 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract 1
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- 238000001530 Raman microscopy Methods 0.000 description 2
- 238000001069 Raman spectroscopy Methods 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- RCMWGBKVFBTLCW-UHFFFAOYSA-N barium(2+);dioxido(dioxo)molybdenum Chemical compound [Ba+2].[O-][Mo]([O-])(=O)=O RCMWGBKVFBTLCW-UHFFFAOYSA-N 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 229910015667 MoO4 Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical group [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 238000001237 Raman spectrum Methods 0.000 description 1
- DIXINEGFTVINCO-UHFFFAOYSA-N [Nb].[Y] Chemical compound [Nb].[Y] DIXINEGFTVINCO-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical group [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 230000005469 synchrotron radiation Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
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- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G39/00—Compounds of molybdenum
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
- C01P2002/82—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by IR- or Raman-data
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Abstract
Description
技术领域
本发明涉及一种BaMoO4的晶型,具体涉及一种新型六方结构BaMoO4及其制备方法。
背景技术
近年来,发光材料在光发射器件、固体激光器和闪烁探测器上得到广泛的研究与应用。室温下,阳离子半径较大的钼酸盐AMoO4(A=Ca,Sr,Ba,Pb)发光材料主要以白钨矿结构形式存在。该结构为四方晶系(I41/a,No.88,Z=4),钼原子与氧原子配位形成[MoO4]2-四面体,A原子与氧原子配位形成[AO8]14-畸变立方体。白钨矿结构钼酸钡(BaMoO4)的光学和热电性能研究显示,该材料的电子体系和发光行为与[MoO4]2-四面体密切相关。
白钨矿结构钼酸钡的高压研究显示,白钨矿结构BaMoO4在常温静水压条件下(5.8GPa、25℃)转变为单斜的褐钇铌矿结构(SG:I2/a,No.15,Z=4);在更高压下(7.2-9.5GPa)转变成为另一未知结构新相。
发明内容
本发明旨在提供一种BaMoO4的新结构及其制备方法,为研究BaMoO4晶体的高温高压结构相变行为,表征BaMoO4新相的物理、化学性质,以及探究BaMoO4电子体系和发光行为的结构特征成为可能。
本发明的另一目的是提供一种所述的新型六方结构BaMoO4的制备方法,将单相的白钨矿结构BaMoO4装在T301不锈刚金属腔体内,充入固态氩,在常温下加压至25~30GPa,然后激光加热至温度为1200~2000℃,保温20~30min,淬火到室温,得到常温常压稳定的新型六方结构BaMoO4。
优选地,所述加压至27GPa,所述加热至温度为1300℃。
优选地,所述单相的白钨矿结构BaMoO4和压标材料装在金属腔体内,所述压标材料采用红宝石颗粒。
优选地,所述固态氩采用液氮冷凝充入至金属腔体内。
优选地,所述单相的白钨矿结构BaMoO4的制备为:按摩尔比为1:1的量称量BaCO3和MoO3,充分混合并研磨,装入铂金坩埚,在1000℃条件下烧结12h以上,使BaCO3分解完全,继续加温到1200℃,烧结并保温24h以上,使BaO与MoO3反应生成单相的白钨矿结构BaMoO4。
本发明的新型六方结构BaMoO4及其制备方法,具有以下优点:
本发明的新型六方结构BaMoO4,以单相的白钨矿结构BaMoO4为原料,通过高温高压合成,其空间群为:R-3m,No.166,晶格常数为: 本发明为研究BaMoO4晶体的高温高压结构相变行为,为表征六方结构BaMoO4新相的物理化学性质,以及探究BaMoO4电子体系和发光行为的结构特征成为可能。
附图说明
图1为本发明的高温高压样品合成的组装图。
图2为本发明制备的六方结构BaMoO4的XRD图谱及其指标化。
图3为本发明制备的六方结构BaMoO4的Raman图谱。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1
一种新型六方结构BaMoO4的制备方法,包含:
(1)在常压下,采用固态高温化学方法制备出单相的白钨矿结构BaMoO4,具体为:
按摩尔比为1:1的量称量化学纯的BaCO3和MoO3、充分混合、研磨均匀、装入铂金坩埚,在1000℃条件下第一次烧结12h以上,使BaCO3分解完全,继续加温到1200℃,第二次烧结并保温24h以上,使BaO与MoO3反应生成BaMoO4。通过拉曼光谱测试样品,如果不是纯的白钨矿结构BaMoO4,需要多次研磨重复烧结,烧结温度为1200℃,优选2次,最终得到单相的白钨矿结构BaMoO4。
(2)采用高温高压方法处理单相的白钨矿结构BaMoO4,制备新型六方结构BaMoO4,具体为:
将单相的白钨矿结构BaMoO4制成厚度约为20μm、直径约为100μm的小圆饼,并装入厚度约为30μm、直径约为150μm的金属腔体(金属腔体的材质为T301不锈钢,由砧面直径为400μm的一对金刚石对压制而成)。
应用液氮冷凝氩气的方法,将氩气通过液氮冷凝装置充入到装有BaMoO4粉末和红宝石颗粒(作为压标材料)的金属腔体内,固态氩为压力传输介质和隔热材料,常温加压到27GPa。
应用激光双面加温系统,在温度和压力分别为27GPa,1300℃的条件下,对金刚石压腔内的样品进行高压高温处理20-30min,再淬火到室温,得到常温常压稳定的高压新相。
将制备的BaMoO4高压新相装入金刚石压机的同步辐射X射线和拉曼光谱测试,新相为六方结构BaMoO4,空间群为:R-3m(No.166),晶格常数为:其结果如图2和3所示,图2为制备的新型六方结构BaMoO4的XRD图谱及其指标化,图3为制备的新型六方结构BaMoO4的Raman图谱。
制备的新型六方结构BaMoO4,随着压力卸载在同步辐射X光或高功率拉曼激光照射下会部分转变成白钨矿结构(见图2的星号)。
尽管本发明的内容已经通过上述优选实施例作了详细介绍,但应当认识到上述的描述不应被认为是对本发明的限制。在本领域技术人员阅读了上述内容后,对于本发明的多种修改和替代都将是显而易见的。因此,本发明的保护范围应由所附的权利要求来限定。
Claims (6)
2.一种如权利要求1所述的新型六方结构BaMoO4的制备方法,其特征在于,将单相的白钨矿结构BaMoO4装在T301不锈刚金属腔体内,充入固态氩,在常温下加压至25~30GPa,然后激光加热至温度为1200~2000℃,保温20~30min,淬火到室温,得到常温常压稳定的新型六方结构BaMoO4。
3.根据权利要求2所述的制备方法,其特征在于,所述加压至27GPa,所述加热至温度为1300℃。
4.根据权利要求2所述的制备方法,其特征在于,所述单相的白钨矿结构BaMoO4和压标材料装在金属腔体内,所述压标材料采用红宝石颗粒。
5.根据权利要求2所述的制备方法,其特征在于,所述固态氩采用液氮冷凝充入至金属腔体内。
6.根据权利要求2-5中任意一项所述的制备方法,其特征在于,所述单相的白钨矿结构BaMoO4的制备为:按摩尔比为1:1的量称量BaCO3和MoO3,充分混合并研磨,装入铂金坩埚,在1000℃条件下烧结12h以上,使BaCO3分解完全,继续加温到1200℃,烧结并保温24h以上,使BaO与MoO3反应生成单相的白钨矿结构BaMoO4。
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CN112575376A (zh) * | 2020-12-04 | 2021-03-30 | 中国科学院广州地球化学研究所 | 新型立方结构锑酸钾晶体及其制备方法 |
CN116621579A (zh) * | 2023-05-24 | 2023-08-22 | 中国科学院新疆理化技术研究所 | 适用于宽温区测温的高精度热敏电阻材料及其制备方法 |
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CN112575376A (zh) * | 2020-12-04 | 2021-03-30 | 中国科学院广州地球化学研究所 | 新型立方结构锑酸钾晶体及其制备方法 |
CN116621579A (zh) * | 2023-05-24 | 2023-08-22 | 中国科学院新疆理化技术研究所 | 适用于宽温区测温的高精度热敏电阻材料及其制备方法 |
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